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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90LS4433-4AI датащи(PDF) 37 Page - ATMEL Corporation |
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AT90LS4433-4AI датащи(HTML) 37 Page - ATMEL Corporation |
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37 / 126 page  37 AT90S/LS4433 1042H–AVR–04/03 Timer/Counter1 Control Register A – TCCR1A • Bits 7, 6 – COM11, COM10: Compare Output Mode1, Bits 1, and 0 The COM11 and COM10 control bits determine any output pin action following a Compare Match in Timer/Counter1. Any output pin actions affect pin OC1 (Output Compare pin 1). This is an alternative function to an I/O port, and the corresponding direction control bit must be set (one) to control an output pin. The control configuration is shown in Table 10. In PWM mode, these bits have a different function. Refer to Table 11 for a detailed description. • Bits 5..2 – Res: Reserved Bits These bits are reserved bits in the AT90S4433 and always read as zero. • Bits 1, 0 – PWM11, PWM10: Pulse Width Modulator Select Bits These bits select PWM operation of Timer/Counter1 as specified in Table 11. This mode is described on page 41. Bit 7 6 5 4 3 2 1 0 $2F ($4F) COM11 COM10 – – – – PWM11 PWM10 TCCR1A Read/Write R/W R/W R R R R R/W R/W Initial Value 0 0 0 0 0 0 0 0 Table 10. Compare 1 Mode Select COM11 COM10 Description 0 0 Timer/Counter1 disconnected from output pin OC1 0 1 Toggle the OC1 output line. 1 0 Clear the OC1 output line (to zero). 1 1 Set the OC1 output line (to one). Table 11. PWM Mode Select PWM11 PWM10 Description 0 0 PWM operation of Timer/Counter1 is disabled 0 1 Timer/Counter1 is an 8-bit PWM 1 0 Timer/Counter1 is a 9-bit PWM 1 1 Timer/Counter1 is a 10-bit PWM |
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